#include <iostream>
#include <list>
using namespace std;

int main(int argc, char const *argv[])
{
    list<char> coll;
    for (char c = 'a'; c <= 'z'; c++)
    {
        coll.push_back(c);
    }

    for (const auto &elem : coll)
    {
        cout << elem << ' ';
    }

    cout << endl;

    return 0;
}
